Captured Beast

Last session, the party was engaged in a fight with a statue that melted to form a creature resembling the description of the Beast from Far Beyond. In the beginning, the party quickly realised that conventional weapons don't work on the beast. In addition, the Beast also began summoning other creatures that began assisting it in battle. However, as the battle goes on, the party realises that the poem they read earlier gave them a clue on how to deal with the Beast. The party began moving creatures and people into the appropriate painting to seal them away, the Beast shrinks with every peace separated from it's body.